Circular Vacuum Sight Glass Fitting Type 390V - PN16
with welding ends according to DIN EN 1092-1 type 11
Sight Glass Fitting Type 390V
Our round vaccum tank sight glass fittings type 390V are welded on a vessel wall or pipeline to allow observation or illumination of the inside. Equipped with welding ends according to DIN EN 1092-1 type 11, the sight glass fittings type 390V are suitable for the most common pipelines. As with our other sightglasses, a sightglass made of chemically highly resistant borosilicate glass to DIN 7080 or similar is clamped between two high-quality stainless steel flanges and proven quality gaskets.
Our type 390V sight glasses are made of the high-quality stainless steel 1.4571 (316Ti) that our customers have appreciated for years. The glass material used is borosilicate glass 3.3 according to DIN 7080 (or similar), which has proven itself in the industry.
The fitting is sealed with ring gaskets adapted to your requirements from an extensive range of materials, like PTFE, NBR, EPDM, FKM, Silicone and many other branded gaskets are available for special applications.
You can find more information about gasket materials in our Help Center.
If the process conditions pose a problem even for the highly resistant borosilicate glass, an FEP or mica protection screen specially adapted to the fitting offers additional protection against steam and aggressive chemicals, such as alkalis up to a pH value of 14.
As with other of our sightglass fittings, our Type 390V can be optionally equipped with SGW type wipers or lights.
More technical details about our sightglass fitting type 390V can be found further down this page!
² depending on environmental variables
¹ Optional materials:
1.0460 / 1.4301 / 1.4307 (F304L) / 1.4404 (F316L) / 1.4410 (Super Duplex) / 1.4435 (F316L) / 1.4462 (F 51) / 1.4529 (Alloy 926) / 1.4539 (Alloy 904L) / 1.4541 (F321) / 1.4547 (F44) / 1.4550 (F347) / 1.4571 (316Ti) / 1.4828 / 1.4841 / 1.4876 ( Alloy 800H) / 1.4878 / 1.7335 / 2.4068 (Alloy 201) / 2.4360 (Alloy 400) / 2.4375 (Alloy K500) / 2.4602 (Alloy C-22) / 2.4605 (Alloy 59) / 2.4610 (Alloy C-4) / 2.4816 (Alloy 600) / 2.4819 (Alloy C-276) / 2.4856 (Alloy 625) / 2.4858 (Alloy 825) / 3.7035 (Titan)
|DN||Da [mm]||Di [mm]||A [mm]||s [mm]||Sealing ring design||Weight [kg]|
|15||95||17||21,3||2||D-Ring DIN 11851||1,6|
|20||105||22||26,9||2,3||D-Ring DIN 11851||2,3|
|25||115||28||33,7||2,6||D-Ring DIN 11851||2,7|
|32||140||37||42,4||2,6||D-Ring DIN 11851||4,0|
|65||185||70||76,1||2,9||D-Ring DIN 11851||6,5|
|80||200||83||88,9||3,2||D-Ring DIN 11851||8,4|
|100||220||107||114,3||3,6||D-Ring DIN 11851||9,8|
|125||250||132||139,7||4||D-Ring DIN 11851||13,3|
|200 (max. 10 bar(g))||340||207||219,1||6,3||O-Ring-System*||25,1|
|250 (max. 10 bar(g))||405||260||273||6,3||O-Ring-System*||37,4|
|300 (max. 6 bar(g))||460||310||323,9||7,1||O-Ring-System*||49,3|
|350 (max. 6 bar(g))||520||340||355,6||8||O-Ring-System*||70|
|*O-ring system including O-ring seal and if necessary PTFE/graphite flat gasket|